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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
dummy	[ DIR ]	drwxr-xr-x
__init__.py	923 B	-rw-r--r--
connection.py	30.56 KB	-rw-r--r--
context.py	10.67 KB	-rw-r--r--
forkserver.py	12.11 KB	-rw-r--r--
heap.py	8.71 KB	-rw-r--r--
managers.py	40.02 KB	-rw-r--r--
pool.py	26.21 KB	-rw-r--r--
popen_fork.py	2.34 KB	-rw-r--r--
popen_forkserver.py	1.97 KB	-rw-r--r--
popen_spawn_posix.py	1.88 KB	-rw-r--r--
popen_spawn_win32.py	3.68 KB	-rw-r--r--
process.py	10.3 KB	-rw-r--r--
queues.py	11.32 KB	-rw-r--r--
reduction.py	9.14 KB	-rw-r--r--
resource_sharer.py	5.23 KB	-rw-r--r--
semaphore_tracker.py	5.34 KB	-rw-r--r--
sharedctypes.py	6.16 KB	-rw-r--r--
spawn.py	8.64 KB	-rw-r--r--
synchronize.py	11.31 KB	-rw-r--r--
util.py	13.36 KB	-rw-r--r--

Code Editor : popen_spawn_posix.py

import io
import os

from .context import reduction, set_spawning_popen
from . import popen_fork
from . import spawn
from . import util

__all__ = ['Popen']

#
# Wrapper for an fd used while launching a process
#

class _DupFd(object):
    def __init__(self, fd):
        self.fd = fd
    def detach(self):
        return self.fd

#
# Start child process using a fresh interpreter
#

class Popen(popen_fork.Popen):
    method = 'spawn'
    DupFd = _DupFd

def __init__(self, process_obj):
        self._fds = []
        super().__init__(process_obj)

def duplicate_for_child(self, fd):
        self._fds.append(fd)
        return fd

def _launch(self, process_obj):
        from . import semaphore_tracker
        tracker_fd = semaphore_tracker.getfd()
        self._fds.append(tracker_fd)
        prep_data = spawn.get_preparation_data(process_obj._name)
        fp = io.BytesIO()
        set_spawning_popen(self)
        try:
            reduction.dump(prep_data, fp)
            reduction.dump(process_obj, fp)
        finally:
            set_spawning_popen(None)

parent_r = child_w = child_r = parent_w = None
        try:
            parent_r, child_w = os.pipe()
            child_r, parent_w = os.pipe()
            cmd = spawn.get_command_line(tracker_fd=tracker_fd,
                                         pipe_handle=child_r)
            self._fds.extend([child_r, child_w])
            self.pid = util.spawnv_passfds(spawn.get_executable(),
                                           cmd, self._fds)
            self.sentinel = parent_r
            with open(parent_w, 'wb', closefd=False) as f:
                f.write(fp.getbuffer())
        finally:
            if parent_r is not None:
                self.finalizer = util.Finalize(self, os.close, (parent_r,))
            for fd in (child_r, child_w, parent_w):
                if fd is not None:
                    os.close(fd)

${this.title}

Code Editor : popen_spawn_posix.py